Dmitriy Shteynbuk — No, Shaking Does Not 'Bruise' Gin

You have heard it in a bar. You have probably read it in a cocktail book. Someone with an opinion about Martinis will explain, gravely, that a Martini must be stirred rather than shaken because shaking 'bruises the gin.'

This is nonsense. Gin cannot be bruised. Neither can any other spirit.

'Bruising' is a phrase borrowed from produce, where the physical mechanism is real — a plum's cell walls can rupture and the flesh discolors. A spirit is not a fruit. It is a homogeneous solution of ethanol, water, and dissolved botanical compounds at 40+% alcohol by volume. There are no cells to rupture. There is no tissue to damage. Ten seconds of aggressive agitation against ice cubes changes the temperature and dilutes the drink. It does not damage the flavor molecules.

So why is a Martini stirred? For real reasons that have nothing to do with bruising.

First, appearance. A stirred Martini is glass-clear. A shaken Martini traps thousands of micro-bubbles of air and picks up a fine dusting of shaved ice; the result is cloudy for ten to fifteen minutes and unattractive in a coupe. Second, texture. Shaking aerates. A gin-and-vermouth drink, poured up, is meant to feel dense and silky on the tongue, and aeration works against that. Third, dilution. Shaking dilutes faster and further than stirring; a stirred Martini finishes closer to the intended ABV.

All three of these are legitimate reasons to stir a Martini. None of them require you to lie about the chemistry. The next time someone tells you not to bruise the gin, ask them which cell walls they are worried about. Then order it however you want.